*Includes costs from 1940-42 for the National Defense Research
Council and the Office of Scientific Research and Development. Excludes $76
million spent by the Army Air Forces on Project SILVERPLATE from September 1943
through September 1945 (Project SILVERPLATE covered the modification of 46 B-29
bombers in support of the Manhattan Project, trained the personnel of the 509th
composite bombing group, and provided logistical support for units based at
Tinian Island, launching point for the attacks on Japan).
Comparison With Selected WWII Expenditures:
(Source: Statistical Review—World War II: A Summary of ASF
Statistics, Statistics Branch, Control Division, Headquarters, Army Service
Forces, U.S. War Department, 1946, pp. 75-6. Cost data are for 1942-1945. The
total cost to the United States for World War II was approximately $3.3
All bombs, mines and grenades — $31.5 billion
Small arms materiel (not incl. ammunition) — $24 billion
All tanks — $64 billion
Heavy field artillery — $4 billion
All other artillery — $33.6 billion
Atomic devices/bombs produced and date detonated:
Gadget July 16, 1945 Alamogordo
Little Boy August 6, 1945 Hiroshima
Fat Man August 9, 1945 Nagasaki
Bomb No. 4 unused
Average cost per atomic device/bomb:
Where Did The Money Go?
(estimated cumulative costs through December 31, 1945)
Sources: Richard G. Hewlett and Oscar E. Anderson, Jr., The New World: A
History of the United States Atomic Energy Commission, Volume 1, 1939/1946
(Oak Ridge, Tennessee: U.S. AEC Technical Information Center, 1972), pp.
723-724. Includes capital and operations costs from 1942 through 1945. Costs
adjusted using a base year of 1944 (the year of highest Manhattan Project
expenditures). Actual costs per facility per year are apparently unknown.
1 Designed and constructed by E.B.
Badger and Sons and the Consolidated Mining and Smelting Company of Canada in
Trail, British Columbia and by E. I. duPont de Nemours and Company in
Morgantown, West Virginia, Montgomery, Alabama, and Dana, Indiana.
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